多循环植物病害病情控制效果计算公式的比较

比较了3个多循环植物病害病情控制效果计算公式:Abbott公式,Henderson-Tilton公式和杨信东公式,认为杨信东公式为最优公式。总结出Abbott公式的误差产生规律:处理区与对照区的初始病情的比值越大,误差越大;处理区与对照区的初始病情的值越小,误差越大;随着处理区与对照区的终期病情的增大,公式的计算误差明显增大。Henderson-Tilton公式的误差产生规律:处理区与对照区的初始病情的比值越小,误差越大;处理区与对照区的初始病情的值越大,误差越大;随着处理区与对照区的终期病情增大,公式的计算误差明显增大。在处理区与对照区的初始病情相差悬殊,处理区与对照区的终期病情大于0.5甚至更多的条件下Abbott公式、Henderson-Tilton公式会产生较大误差,不能客观评价杀菌剂或其它控病措施的功效,而采用杨信东公式则能客观评价杀菌剂或其他控病措施的效果。

Comparative study of the formulas for calculating of outbreak control multi|cycle plant disease

In this study,after comparing of three formulas that they are Abbott formula,Henderson-Tilton formula and Yang xindong formula for calculating of outbreak control multi-cycle plant disease,there is the result:Yang xindong formula is the optimization.In Abbott formula,the more the radio of the initial epidemic situation in treatment and control is,the greater error is;The smaller the values of the initial epidemic situation in treatment and control are,the greater error is.The greater the values of final epi...